Haier GE NS23AM Service Manual page 92

GAUGE SET
CONNECTIONS FOR TESTING AND CHARGING
A. CLOSE MANIFOLD GAUGE SET VALVES AND CONNECT THE CENTER HOSE TO A CYLINDER OF HFC-410A SET FOR LIQUID PHASE CHARGING.
B. CONNECT THE MANIFOLD GAUGE SET'S LOW PRESSURE SIDE TO THE SUCTION LINE SERVICE PORT.
C. CONNECT THE MANIFOLD GAUGE SET'S HIGH PRESSURE SIDE TO THE LIQUID LINE SERVICE PORT.
D. POSITION TEMPERATURE SENSOR ON LIQUID LINE NEAR LIQUID LINE SERVICE PORT.
AIRFLOW
DRY
BULB
C
T
DROP
53º
19º
AIR
FLOW
ALL TEMPERATURES ARE
EXPRESSED IN ºF
ASSUME DT = 15 AND A TEMP. = 72º, BELOW C TEMPERATURES REQUIRE ACTION:
Cº
T –
DT =
DROP
53º
19 – 15 =
58º
14 – 15 =
62º
10 – 15 =
Figure 49.
REFRIGERANT TANK
CHARGE IN
LIQUID PHASE
DIGITAL SCALE
D
TEMPERATURE
SENSOR
Figure 48. Gauge Set Connections
TEMPERATURE OF AIR
INDOOR COIL
ENTERING INDOOR COIL ºF
A
B
AIR
FLOW
64º
INDOOR
COIL
ºF ACTION
4 INCREASE THE AIRFLOW
-1 (WITHIN +3º RANGE) NO CHANGE
-5 DECREASE THE AIRFLOW
Page 92
MANIFOLD GAUGE SET
HIGH
LOW
A
SUCTION LINE
C
TO LIQUID
TEMPERATURE SENSOR
LINE SERVICE
PORT
80 24 24 24 23 23 22 22 22 20 19 18 17 16 15
78 23 23 23 22 22 21 21 20 19 18 17 16 15 14
76 22 22 22 21 21 20 19 19 18 17 16 15 14 13
74 21 21 21 20 19 19 18 17 16 16 15 14 13 12
72 20 20 19 18 17 17 16 15 15 14 13 12 11 10
70 19 19 18 18 17 17 16 15 15 14 13 12 11 10
WET-BULB ºF 57 58 59 60 61 62 63 64 65 66 67 68 69 70
A
1. DETERMINE THE DESIRED DT — MEASURE ENTERING AIR
72º
TEMPERATURE USING DRY BULB (A) AND WET BULB (B).
DT IS THE INTERSECTING VALUE OF A AND B IN THE
TABLE (SEE TRIANGLE).
2. FIND TEMPERATURE DROP ACROSS COIL — MEASURE
ING THE COIL (A AND C). TEMPERATURE DROP FORMULA:
(T ) = A MINUS C.
DROP
DRY BULB
FERENCE BETWEEN THE MEASURED T
WET
SIRED DT (T
BULB
DROP
NEEDED. SEE EXAMPLE AT LEFT:
4. ADJUST THE FAN SPEED
TIONS TO INCREASE/DECREASE FAN SPEED.
TURES; RECHECK TEMPERATURES TO CONFIRM THAT THE
TEMPERATURE DROP AND DT ARE WITHIN +3º.
OUTDOOR UNIT
B
(LIQUID LINE)
DT
B
DROP
–DT) IS WITHIN +3º, NO ADJUSTMENT IS
31-5000746 Rev. 0